A circular, single or multipiece item, metallic or nonmetallic in composition, designed to be fitted in a circumferential groove in a piston and to spring outward against the cylinder wall to function as a seal or wiper. It is supplied in various cross-sectional shapes and is cut through at one point to allow for installation in the piston ring groove. It may include an expander. Excludes packing, preformed; retainer, oil seal; retainer, packing; ring, retaining; ring wiper; and seal ring, metal.
Classification: Parts for steam turbines
NSN 5915-01-631-0463
NSN 5910-00-160-5770
NSN 5960-01-263-3407
NSN 6610-01-008-7564
NSN 5998-00-241-5134
NSN 5996-01-249-3215
NSN 4140-00-491-7699
NSN 5945-01-107-0745
NSN 5855-01-132-5139
NSN 4140-01-445-6656
NSN 6685-00-184-3894
NSN 6610-01-606-8788